Sand-strainer for deep wells



(No Model.)

J. H. KING.

SAND $TRAINER FOR DEEP WELLS.

No. 447,882. Patented Mar. 10,1891.

lmlh/mooay 51400-14 l'o'c 5 @331 AM Grimm W07 UNITED STATES ATENTEnron...

JOHN II. KING, OF CINCINNATI, OHIO, ASSIGNOR OF ONE-HALF TO REES \V.DUGAN, OF COVINGTON, KENTUCKY.

SAND-STRAINER FOR DEEP WEL LS.

SPECIFICATION forming part of Letters Patent No. 447,882, dated March10, 1891.

Application filed November 22, 1890. Serial No. 372,285. (N model.)

To all whom, it may concern:

Be it known that 1, JOHN II. KING, a citizen of the United States, and aresident of Cincinnati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvements in Sand-Strainers forDeep \Vells, of which the following is a specification. The object of myinvention is to provide a cheap durable strainer for deep wells. In delovices of this class the perforations are required to be very small andare ordinarily made with a milling-tool or fine circular saw. Thesetools cannot be made so light. that they will cut the slots fine enoughfrom the outside I5 of the tube inward, nor can they be made lightenough to make the proper-sized slots when the tool is used inside thetube, except when light soft yellow brass is used, and even in suchcases the tool must be beveled back from the cutting-edge in order togive it strength. This makes a V-shaped slot, leavingbut a slightthickness of the soft metal at .the contracted openings of the slots,which are soon enlarged by the small particles of quicksand and thestrainer rendered worthless.

By means of my invention I am enabled to make my strainer of any of thehard tough non-corrodible metals, such as aluminiumbronze,phosphor-bronze, gun-metal, &c., and can make the tubing much heavierthan the soft tubing now used, and can make thewalls of the perforationsparallel instead of V- shaped. 5 I will first describe my inventionfully in connection with the accompanying drawings, and willparticularly refer to and point out its novel features in the claims.

Referring to the drawings, in which like parts are indicated by similarreference-letters wherever they occur throughout the various views,Figure l is a central vertical section of a sand-strainer constructedaccording to my invention. Fig. 2 is a top plan view of 5 the same.

The strainer A is preferably formed of corrugated metal tubing. Over thetop of this is fitted a brass collar B, theinterior of which conforms tothe exterior of the strainer-tube, to which the collar is firmly unitedby solder and rivets a: 00, or in any approved manner.

Around this collar is stretched the customary elastic packing-ring O toform a water-301111; with the lower contracted end of the well-tube,

as shown in dotted line, Fig. 1.

In the bottom of the strainer is secured a disk D, the perimeter ofwhich is corrugated to snugly fit into the tube A. This is secured inplace by screws, rivets, or in any suitable manner. The upper side ofthis disk I) is 60. provided with the customary bail d, by which thestrainer is grappled and drawn out when desired. The higher orprojecting corrugations a of the tube A are transversely slotted, asshown, across their entire faces, leaving the lower parts or depressionsa intact to support the ribs a formed by slotting.

My method of forming the slots or meshes of my strainer is to mount thetubeA'between centers and slowly revolve it against the blade of aband-saw running at a high speed.

I use a strong solution of soap and water as a lubricant and cooler. Iam enabled to use a very thin saw-blade, as light as the one sixtyfourthpart of an inch. By this method I perform the work of slotting the tubeVery rapidly and make the meshes as fine as desired.

I do not confine myself to the exact form of corrugations shown,as theessence of my invention is in the means whereby the tube may be slottedfrom the exterior in the manner described and leaving unsevered verticalribs to supportthe transverse ribs formed by the perforations. It isobvious that the form of corrugations may be changed without departingfrom the spirit and scope of my invention. It is also obvious thatinstead of employing the seamless tube I may form the part A or thewhole strainer by casting.

I claim 1. The hereinbefore-described strainer for deep wells,consisting of the tube A, having its perimeter of varying diameters, theouter portions a of which are transversely slotted and the inner ones aleft unsevered to support the ribs a which form the meshes of thestrainer.

2. As a strainerfor deep wells, the corrugated metal tube A, having thealternate lon- I00 gitudinal convex ribs a and concave depressions a,the said ribs a being transversely slotted to form meshes for thestrainer, substantially as shown and described.

I The method of forming strainers fordeep wells, Which consists incorrugating the cylinder, mounting the same between centers, andrevolving the said corrugated cylinder against a traveling saw-blade andsevering the outer or higher corrugations transversely to form meshesfor the strainer, substantially as shown and described.

JOHN ll. KING.

Witnesses GEO. J. MURRAY, R. W. DUGAN.

